6be18e43cf
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2356 42af7a65-404d-4744-a932-0658087f49c3
111 lines
4.0 KiB
C
111 lines
4.0 KiB
C
/****************************************************************************
|
|
* up_exit.c
|
|
*
|
|
* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sched.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/arch.h>
|
|
|
|
#include "os_internal.h"
|
|
#include "up_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Private Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: _exit
|
|
*
|
|
* Description:
|
|
* This function causes the currently executing task to cease
|
|
* to exist. This is a special case of task_delete() where the task to
|
|
* be deleted is the currently executing task. It is more complex because
|
|
* a context switch must be perform to the next ready to run task.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void _exit(int status)
|
|
{
|
|
_TCB* tcb;
|
|
|
|
sdbg("TCB=%p exitting\n", tcb);
|
|
|
|
/* Destroy the task at the head of the ready to run list. */
|
|
|
|
(void)task_deletecurrent();
|
|
|
|
/* Now, perform the context switch to the new ready-to-run task at the
|
|
* head of the list.
|
|
*/
|
|
|
|
tcb = (_TCB*)g_readytorun.head;
|
|
sdbg("New Active Task TCB=%p\n", tcb);
|
|
|
|
/* The way that we handle signals in the simulation is kind of
|
|
* a kludge. This would be unsafe in a truly multi-threaded, interrupt
|
|
* driven environment.
|
|
*/
|
|
|
|
if (tcb->xcp.sigdeliver)
|
|
{
|
|
sdbg("Delivering signals TCB=%p\n", tcb);
|
|
((sig_deliver_t)tcb->xcp.sigdeliver)(tcb);
|
|
tcb->xcp.sigdeliver = NULL;
|
|
}
|
|
|
|
/* Then switch contexts */
|
|
|
|
up_longjmp(tcb->xcp.regs, 1);
|
|
}
|
|
|